DUE IN 30 MINS PLZ HELP :))

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?